论文部分内容阅读
本文从以下六个方面阐述“缩角”的有关方法. 一、利用已知条件“缩角” [例1]若sinθ+cosθ=7/13且 θ∈(0,π),则tanθ的值为( ) (A)-12/5 (B)-5/12
This article explains the related methods of “shrink angle” from the following six aspects. First, using known conditions “reduced angle” [Example 1] If sinθ+cosθ=7/13 and θ∈(0,π), The value of tanθ is () (A)-12/5 (B)-5/12